Source Code Cross Referenced for XYBubbleRenderer.java in  » Chart » jfreechart » org » jfree » chart » renderer » xy » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Chart » jfreechart » org.jfree.chart.renderer.xy 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* ===========================================================
002:         * JFreeChart : a free chart library for the Java(tm) platform
003:         * ===========================================================
004:         *
005:         * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
006:         *
007:         * Project Info:  http://www.jfree.org/jfreechart/index.html
008:         *
009:         * This library is free software; you can redistribute it and/or modify it 
010:         * under the terms of the GNU Lesser General Public License as published by 
011:         * the Free Software Foundation; either version 2.1 of the License, or 
012:         * (at your option) any later version.
013:         *
014:         * This library is distributed in the hope that it will be useful, but 
015:         * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
016:         * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
017:         * License for more details.
018:         *
019:         * You should have received a copy of the GNU Lesser General Public
020:         * License along with this library; if not, write to the Free Software
021:         * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
022:         * USA.  
023:         *
024:         * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
025:         * in the United States and other countries.]
026:         *
027:         * ---------------------
028:         * XYBubbleRenderer.java
029:         * ---------------------
030:         * (C) Copyright 2003-2007, by Object Refinery Limited.
031:         *
032:         * Original Author:  David Gilbert (for Object Refinery Limited);
033:         * Contributor(s):   Christian W. Zuckschwerdt;
034:         *
035:         * $Id: XYBubbleRenderer.java,v 1.8.2.13 2007/06/13 09:57:14 mungady Exp $
036:         *
037:         * Changes
038:         * -------
039:         * 28-Jan-2003 : Version 1 (DG);
040:         * 25-Mar-2003 : Implemented Serializable (DG);
041:         * 01-May-2003 : Modified drawItem() method signature (DG);
042:         * 30-Jul-2003 : Modified entity constructor (CZ);
043:         * 20-Aug-2003 : Implemented Cloneable and PublicCloneable (DG);
044:         * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
045:         * 10-Feb-2004 : Small change to drawItem() method to make cut-and-paste 
046:         *               overriding easier (DG);
047:         * 15-Jul-2004 : Switched getZ() and getZValue() methods (DG);
048:         * 19-Jan-2005 : Now accesses only primitives from dataset (DG);
049:         * 28-Feb-2005 : Modify renderer to use circles in legend (DG);
050:         * 17-Mar-2005 : Fixed bug in bubble bounds calculation (DG);
051:         * 20-Apr-2005 : Use generators for legend tooltips and URLs (DG);
052:         * ------------- JFREECHART 1.0.x ---------------------------------------------
053:         * 13-Dec-2005 : Added support for item labels (bug 1373371) (DG);
054:         * 20-Jan-2006 : Check flag for drawing item labels (DG);
055:         * 21-Sep-2006 : Respect the outline paint and stroke settings (DG);
056:         * 24-Jan-2007 : Added new equals() override (DG);
057:         * 06-Feb-2007 : Fixed bug 1086307, crosshairs with multiple axes (DG);
058:         * 20-Apr-2007 : Updated getLegendItem() for renderer change (DG);
059:         * 17-May-2007 : Set datasetIndex and seriesIndex in getLegendItem() (DG);
060:         * 18-May-2007 : Set dataset and seriesKey for LegendItem (DG);
061:         * 13-Jun-2007 : Fixed seriesVisibility bug (DG);
062:         *
063:         */
064:
065:        package org.jfree.chart.renderer.xy;
066:
067:        import java.awt.Graphics2D;
068:        import java.awt.Paint;
069:        import java.awt.Shape;
070:        import java.awt.Stroke;
071:        import java.awt.geom.Ellipse2D;
072:        import java.awt.geom.Rectangle2D;
073:        import java.io.Serializable;
074:
075:        import org.jfree.chart.LegendItem;
076:        import org.jfree.chart.axis.ValueAxis;
077:        import org.jfree.chart.entity.EntityCollection;
078:        import org.jfree.chart.plot.CrosshairState;
079:        import org.jfree.chart.plot.PlotOrientation;
080:        import org.jfree.chart.plot.PlotRenderingInfo;
081:        import org.jfree.chart.plot.XYPlot;
082:        import org.jfree.data.xy.XYDataset;
083:        import org.jfree.data.xy.XYZDataset;
084:        import org.jfree.ui.RectangleEdge;
085:        import org.jfree.util.PublicCloneable;
086:
087:        /**
088:         * A renderer that draws a circle at each data point with a diameter that is
089:         * determined by the z-value in the dataset (the renderer requires the dataset 
090:         * to be an instance of {@link XYZDataset}.
091:         */
092:        public class XYBubbleRenderer extends AbstractXYItemRenderer implements 
093:                XYItemRenderer, Cloneable, PublicCloneable, Serializable {
094:
095:            /** For serialization. */
096:            public static final long serialVersionUID = -5221991598674249125L;
097:
098:            /** 
099:             * A constant to specify that the bubbles drawn by this renderer should be 
100:             * scaled on both axes (see {@link #XYBubbleRenderer(int)}). 
101:             */
102:            public static final int SCALE_ON_BOTH_AXES = 0;
103:
104:            /** 
105:             * A constant to specify that the bubbles drawn by this renderer should be 
106:             * scaled on the domain axis (see {@link #XYBubbleRenderer(int)}). 
107:             */
108:            public static final int SCALE_ON_DOMAIN_AXIS = 1;
109:
110:            /** 
111:             * A constant to specify that the bubbles drawn by this renderer should be 
112:             * scaled on the range axis (see {@link #XYBubbleRenderer(int)}). 
113:             */
114:            public static final int SCALE_ON_RANGE_AXIS = 2;
115:
116:            /** Controls how the width and height of the bubble are scaled. */
117:            private int scaleType;
118:
119:            /**
120:             * Constructs a new renderer.
121:             */
122:            public XYBubbleRenderer() {
123:                this (SCALE_ON_BOTH_AXES);
124:            }
125:
126:            /**
127:             * Constructs a new renderer with the specified type of scaling. 
128:             *
129:             * @param scaleType  the type of scaling (must be one of: 
130:             *        {@link #SCALE_ON_BOTH_AXES}, {@link #SCALE_ON_DOMAIN_AXIS}, 
131:             *        {@link #SCALE_ON_RANGE_AXIS}).
132:             */
133:            public XYBubbleRenderer(int scaleType) {
134:                super ();
135:                if (scaleType < 0 || scaleType > 2) {
136:                    throw new IllegalArgumentException("Invalid 'scaleType'.");
137:                }
138:                this .scaleType = scaleType;
139:            }
140:
141:            /**
142:             * Returns the scale type that was set when the renderer was constructed.
143:             *
144:             * @return The scale type (one of: {@link #SCALE_ON_BOTH_AXES}, 
145:             *         {@link #SCALE_ON_DOMAIN_AXIS}, {@link #SCALE_ON_RANGE_AXIS}).
146:             */
147:            public int getScaleType() {
148:                return this .scaleType;
149:            }
150:
151:            /**
152:             * Draws the visual representation of a single data item.
153:             *
154:             * @param g2  the graphics device.
155:             * @param state  the renderer state.
156:             * @param dataArea  the area within which the data is being drawn.
157:             * @param info  collects information about the drawing.
158:             * @param plot  the plot (can be used to obtain standard color 
159:             *              information etc).
160:             * @param domainAxis  the domain (horizontal) axis.
161:             * @param rangeAxis  the range (vertical) axis.
162:             * @param dataset  the dataset (an {@link XYZDataset} is expected).
163:             * @param series  the series index (zero-based).
164:             * @param item  the item index (zero-based).
165:             * @param crosshairState  crosshair information for the plot 
166:             *                        (<code>null</code> permitted).
167:             * @param pass  the pass index.
168:             */
169:            public void drawItem(Graphics2D g2, XYItemRendererState state,
170:                    Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot,
171:                    ValueAxis domainAxis, ValueAxis rangeAxis,
172:                    XYDataset dataset, int series, int item,
173:                    CrosshairState crosshairState, int pass) {
174:
175:                // return straight away if the item is not visible
176:                if (!getItemVisible(series, item)) {
177:                    return;
178:                }
179:
180:                PlotOrientation orientation = plot.getOrientation();
181:
182:                // get the data point...
183:                double x = dataset.getXValue(series, item);
184:                double y = dataset.getYValue(series, item);
185:                double z = Double.NaN;
186:                if (dataset instanceof  XYZDataset) {
187:                    XYZDataset xyzData = (XYZDataset) dataset;
188:                    z = xyzData.getZValue(series, item);
189:                }
190:                if (!Double.isNaN(z)) {
191:                    RectangleEdge domainAxisLocation = plot.getDomainAxisEdge();
192:                    RectangleEdge rangeAxisLocation = plot.getRangeAxisEdge();
193:                    double transX = domainAxis.valueToJava2D(x, dataArea,
194:                            domainAxisLocation);
195:                    double transY = rangeAxis.valueToJava2D(y, dataArea,
196:                            rangeAxisLocation);
197:
198:                    double transDomain = 0.0;
199:                    double transRange = 0.0;
200:                    double zero;
201:
202:                    switch (getScaleType()) {
203:                    case SCALE_ON_DOMAIN_AXIS:
204:                        zero = domainAxis.valueToJava2D(0.0, dataArea,
205:                                domainAxisLocation);
206:                        transDomain = domainAxis.valueToJava2D(z, dataArea,
207:                                domainAxisLocation)
208:                                - zero;
209:                        transRange = transDomain;
210:                        break;
211:                    case SCALE_ON_RANGE_AXIS:
212:                        zero = rangeAxis.valueToJava2D(0.0, dataArea,
213:                                rangeAxisLocation);
214:                        transRange = zero
215:                                - rangeAxis.valueToJava2D(z, dataArea,
216:                                        rangeAxisLocation);
217:                        transDomain = transRange;
218:                        break;
219:                    default:
220:                        double zero1 = domainAxis.valueToJava2D(0.0, dataArea,
221:                                domainAxisLocation);
222:                        double zero2 = rangeAxis.valueToJava2D(0.0, dataArea,
223:                                rangeAxisLocation);
224:                        transDomain = domainAxis.valueToJava2D(z, dataArea,
225:                                domainAxisLocation)
226:                                - zero1;
227:                        transRange = zero2
228:                                - rangeAxis.valueToJava2D(z, dataArea,
229:                                        rangeAxisLocation);
230:                    }
231:                    transDomain = Math.abs(transDomain);
232:                    transRange = Math.abs(transRange);
233:                    Ellipse2D circle = null;
234:                    if (orientation == PlotOrientation.VERTICAL) {
235:                        circle = new Ellipse2D.Double(transX - transDomain
236:                                / 2.0, transY - transRange / 2.0, transDomain,
237:                                transRange);
238:                    } else if (orientation == PlotOrientation.HORIZONTAL) {
239:                        circle = new Ellipse2D.Double(
240:                                transY - transRange / 2.0, transX - transDomain
241:                                        / 2.0, transRange, transDomain);
242:                    }
243:                    g2.setPaint(getItemPaint(series, item));
244:                    g2.fill(circle);
245:                    g2.setStroke(getItemOutlineStroke(series, item));
246:                    g2.setPaint(getItemOutlinePaint(series, item));
247:                    g2.draw(circle);
248:
249:                    if (isItemLabelVisible(series, item)) {
250:                        if (orientation == PlotOrientation.VERTICAL) {
251:                            drawItemLabel(g2, orientation, dataset, series,
252:                                    item, transX, transY, false);
253:                        } else if (orientation == PlotOrientation.HORIZONTAL) {
254:                            drawItemLabel(g2, orientation, dataset, series,
255:                                    item, transY, transX, false);
256:                        }
257:                    }
258:
259:                    // add an entity if this info is being collected
260:                    EntityCollection entities = null;
261:                    if (info != null) {
262:                        entities = info.getOwner().getEntityCollection();
263:                        if (entities != null && circle.intersects(dataArea)) {
264:                            addEntity(entities, circle, dataset, series, item,
265:                                    circle.getCenterX(), circle.getCenterY());
266:                        }
267:                    }
268:
269:                    int domainAxisIndex = plot.getDomainAxisIndex(domainAxis);
270:                    int rangeAxisIndex = plot.getRangeAxisIndex(rangeAxis);
271:                    updateCrosshairValues(crosshairState, x, y,
272:                            domainAxisIndex, rangeAxisIndex, transX, transY,
273:                            orientation);
274:                }
275:
276:            }
277:
278:            /**
279:             * Returns a legend item for the specified series.  The default method
280:             * is overridden so that the legend displays circles for all series.
281:             *
282:             * @param datasetIndex  the dataset index (zero-based).
283:             * @param series  the series index (zero-based).
284:             *
285:             * @return A legend item for the series.
286:             */
287:            public LegendItem getLegendItem(int datasetIndex, int series) {
288:                LegendItem result = null;
289:                XYPlot plot = getPlot();
290:                if (plot == null) {
291:                    return null;
292:                }
293:
294:                XYDataset dataset = plot.getDataset(datasetIndex);
295:                if (dataset != null) {
296:                    if (getItemVisible(series, 0)) {
297:                        String label = getLegendItemLabelGenerator()
298:                                .generateLabel(dataset, series);
299:                        String description = label;
300:                        String toolTipText = null;
301:                        if (getLegendItemToolTipGenerator() != null) {
302:                            toolTipText = getLegendItemToolTipGenerator()
303:                                    .generateLabel(dataset, series);
304:                        }
305:                        String urlText = null;
306:                        if (getLegendItemURLGenerator() != null) {
307:                            urlText = getLegendItemURLGenerator()
308:                                    .generateLabel(dataset, series);
309:                        }
310:                        Shape shape = new Ellipse2D.Double(-4.0, -4.0, 8.0, 8.0);
311:                        Paint paint = lookupSeriesPaint(series);
312:                        Paint outlinePaint = lookupSeriesOutlinePaint(series);
313:                        Stroke outlineStroke = lookupSeriesOutlineStroke(series);
314:                        result = new LegendItem(label, description,
315:                                toolTipText, urlText, shape, paint,
316:                                outlineStroke, outlinePaint);
317:                        result.setDataset(dataset);
318:                        result.setDatasetIndex(datasetIndex);
319:                        result.setSeriesKey(dataset.getSeriesKey(series));
320:                        result.setSeriesIndex(series);
321:                    }
322:                }
323:                return result;
324:            }
325:
326:            /**
327:             * Tests this renderer for equality with an arbitrary object.
328:             * 
329:             * @param obj  the object (<code>null</code> permitted).
330:             * 
331:             * @return A boolean.
332:             */
333:            public boolean equals(Object obj) {
334:                if (obj == this ) {
335:                    return true;
336:                }
337:                if (!(obj instanceof  XYBubbleRenderer)) {
338:                    return false;
339:                }
340:                XYBubbleRenderer that = (XYBubbleRenderer) obj;
341:                if (this .scaleType != that.scaleType) {
342:                    return false;
343:                }
344:                return super .equals(obj);
345:            }
346:
347:            /**
348:             * Returns a clone of the renderer.
349:             * 
350:             * @return A clone.
351:             * 
352:             * @throws CloneNotSupportedException  if the renderer cannot be cloned.
353:             */
354:            public Object clone() throws CloneNotSupportedException {
355:                return super.clone();
356:            }
357:
358:        }
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